case895 air in brake system

[retro7570]

After setting for 3 or 4 days right brake gets air in system, left side works as it should. Had several opinions on cause but no solutions to stop problem. Thanks in advance.

 

[RickB]

Failed brake piston seal. Replace both right side brake piston seals.

 

[Farmer495]

After setting for 3 or 4 days right brake gets air in system, left side works as it should. Had several opinions on cause but no solutions to stop problem. Thanks in advance.

I kept losing left brake on a smaller 95 series, kept having to bleed air out of it, be good a few days then gone.

I crawled under tractor one day and noticed the lines near the hyd filter were dusty/oily, I found one slightly loose. I tightened it and never had brake issue again.